Respiratory Drugs Hormones and the Endocrine System Antipyretic analgesics Antiallergic drugs Antiparasitic drugs Antibiotics Antineoplastic agents Anesthetic Agents Urinary System Drugs Other Chemical drugs Synthetic Anti-infective Drugs Nervous system drugs Fluid, Electrolyte, and Acid-Base Balance Vitamins and Minerals medicines Digestive system drugs Blood System Drugs Circulatory system drugs Diagnostic agents Specialty drugs Drug metabolism Feed Additive Anti-stress drugs Heat-clearing prescription Common vaccine and bacterin Disease-resistant serum Animal Diagnostic Biologicals Drugs Influencing Immune Function Veterinary raw materials Inhibitors
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API

Respiratory Drugs Hormones and the Endocrine System Antipyretic analgesics Antiallergic drugs Antiparasitic drugs Antibiotics Antineoplastic agents Anesthetic Agents Urinary System Drugs Other Chemical drugs Synthetic Anti-infective Drugs Nervous system drugs Fluid, Electrolyte, and Acid-Base Balance Vitamins and Minerals medicines Digestive system drugs Blood System Drugs Circulatory system drugs Diagnostic agents Specialty drugs Drug metabolism Feed Additive Anti-stress drugs Heat-clearing prescription Common vaccine and bacterin Disease-resistant serum Animal Diagnostic Biologicals Drugs Influencing Immune Function Veterinary raw materials Inhibitors
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Active Pharmaceutical Ingredients (API), popularly  speaking, are the raw materials of medicines, only pharmaceutical raw materials are processed into pharmaceutical preparations , can they become medicines available for clinical use, so drugs we usually eat  are  the finished drugs  through processing.

Active Pharmaceutical Ingredients based on its sources can be divided into two major categories ,including  chemical synthetic drugs and natural chemical drugs.

Chemical  synthetic drugs can be divided into organic synthetic drugs and inorganic  synthetic drugs. Inorganic synthetic drugs are inorganic compounds (  very few is element), such as aluminum hydroxide, magnesium trisilicate which are used for the treatment of gastric and duodenal ulcers ; organic synthetic drugs are mainly composed of  drugs made by  basic organic chemical raw materials, through a series of organic chemical reactions  (such as aspirin, chloramphenicol, caffeine, etc.).

Natural chemical drugs ,based on its sources,can be divided into two categories including biochemical drugs and plant chemical drugs. Antibiotics are generally made by the microbial fermentation,  which belongs to the biochemistry category. A variety of semi-synthetic antibiotics occurs in recent years,which are biosynthesis and chemical synthesis combining products.Among active Pharmaceutical Ingredients, the organic synthetic drugs varieties, yields and values have  the largest proportion,which are  the main pillars of the chemical and pharmaceutical industries. The quality of active Pharmaceutical Ingredients  decides whether the formulation is good or bad , so its quality standards are very strict  ,countries in the world have developed national pharmacopoeia standards and strict quality control methods for its widely used active Pharmaceutical ingredients.

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Structure:
Chemical Name:
iodine
CAS:
12190-71-5
MF:
I2
Structure:
Chemical Name:
4-(4-Methylpiperazin-1-ylmethyl)benzoyl chloride
CAS:
148077-69-4
MF:
C13H17ClN2O
Structure:
Chemical Name:
1-(5-BROMO-2-METHOXYBENZENESULPHONYL)PIPERIDINE
CAS:
295360-83-7
MF:
C12H16BrNO3S
Structure:
Chemical Name:
CYCLOSPORINE
CAS:
79217-60-0
MF:
C62H111N11O12
Structure:
Chemical Name:
2-METHYL-5-(PIPERIDIN-1-YLSULFONYL)PHENYLBORONIC ACID
CAS:
871333-00-5
MF:
C12H18BNO4S
Structure:
Chemical Name:
Cefotetan
CAS:
69712-56-7
MF:
C17H17N7O8S4
Structure:
Chemical Name:
Metoprolol
CAS:
51384-51-1
MF:
C15H25NO3
Structure:
Chemical Name:
Edrophonium chloride
CAS:
116-38-1
MF:
C10H16ClNO
Structure:
Chemical Name:
PAROXETINE-D4 HCL
CAS:
110429-35-1
MF:
C19H23ClFNO4
Chemical Name:
Collagen
CAS:
9064-67-9
MF:
C4H6N2O3R2.(C7H9N2O2R)n
Structure:
Chemical Name:
Homatropine Hydrobromide
CAS:
51-56-9
MF:
C16H22BrNO3
Structure:
Chemical Name:
Diatrizoic Acid Dihydrate
CAS:
50978-11-5
MF:
C11H11I3N2O5
Structure:
Chemical Name:
Dimethicone
CAS:
9006-65-9
MF:
C6H18OSi2
Structure:
Chemical Name:
Cefuroxime 1-acetoxyethyl ester
CAS:
64544-07-6
MF:
C20H22N4O10S
Structure:
Chemical Name:
3-BROMO-N-METHYLBENZENESULPHONAMIDE
CAS:
153435-79-1
MF:
C7H8BrNO2S
Structure:
Chemical Name:
Promethazine hydrochloride
CAS:
58-33-3
MF:
C17H21ClN2S
Structure:
Chemical Name:
4-BROMO-N-ETHYLBENZENESULPHONAMIDE
CAS:
1984-25-4
MF:
C8H10BrNO2S
Structure:
Chemical Name:
Iopanoic acid
CAS:
96-83-3
MF:
C11H12I3NO2
Structure:
Chemical Name:
Tolazoline
CAS:
59-98-3
MF:
C10H12N2
Structure:
Chemical Name:
Cefetamet hydrochloride
CAS:
65052-63-3
MF:
C14H15N5O5S2
Structure:
Chemical Name:
Octreotide
CAS:
79517-01-4
MF:
C51H70N10O12S2
Structure:
Chemical Name:
Moclobemide
CAS:
71320-77-9
MF:
C13H17ClN2O2
Structure:
Chemical Name:
Toremifene
CAS:
89778-26-7
MF:
C26H28ClNO
Structure:
Chemical Name:
5-(N,N-DIMETHYLSULFAMOYL)-2-METHYLPHENYLBORONIC ACID
CAS:
871332-99-9
MF:
C9H14BNO4S
Structure:
Chemical Name:
DL-Norephedrine hydrochloride
CAS:
154-41-6
MF:
C9H14ClNO
Structure:
Chemical Name:
Huperzine A
CAS:
120786-18-7
MF:
C15H18N2O
Structure:
Chemical Name:
Diflorasone
CAS:
2557-49-5
MF:
C22H28F2O5
Structure:
Chemical Name:
Flomoxef
CAS:
99665-00-6
MF:
C15H18F2N6O7S2
Chemical Name:
INSULIN
CAS:
11070-73-8
MF:
C254H377N65O75S6
Structure:
Chemical Name:
Daunorubicin
CAS:
20830-81-3
MF:
C27H29NO10
Structure:
Chemical Name:
Halazone
CAS:
80-13-7
MF:
C7H5Cl2NO4S
Structure:
Chemical Name:
Sulbactam sodium
CAS:
69388-84-7
MF:
C8H12NNaO5S
Structure:
Chemical Name:
Hydrocortisone sodium succinate
CAS:
125-04-2
MF:
C25H33O8.Na
Structure:
Chemical Name:
3-BROMO-N-ETHYLBENZENESULPHONAMIDE
CAS:
871269-07-7
MF:
C8H10BrNO2S
Structure:
Chemical Name:
Rilmenidine
CAS:
54187-04-1
MF:
C10H16N2O
Structure:
Chemical Name:
Benzathine benzylpenicillin
CAS:
1538-09-6
MF:
C48H56N6O8S2
Structure:
Chemical Name:
Cefetamet pivoxyl
CAS:
65243-33-6
MF:
C20H25N5O7S2
Structure:
Chemical Name:
Tylosin tartrate
CAS:
1405-54-5
MF:
C46H77NO17
Structure:
Chemical Name:
CEPHALOTAXINE
CAS:
24316-19-6
MF:
C18H21NO4
Structure:
Chemical Name:
PARGYLINE HYDROCHLORIDE
CAS:
306-07-0
MF:
C11H14ClN
Structure:
Chemical Name:
4-(5-BROMO-2-METHOXYBENZENESULPHONYL)MORPHOLINE
CAS:
325809-68-5
MF:
C11H14BrNO4S
Structure:
Chemical Name:
Pyrithioxin dihydrochloride
CAS:
10049-83-9
MF:
C16H22Cl2N2O4S2
Structure:
Chemical Name:
Premarin
CAS:
12126-59-9
MF:
C18H19NaO5S
Structure:
Chemical Name:
Metandienone
CAS:
72-63-9
MF:
C20H28O2
Structure:
Chemical Name:
Flecainide
CAS:
54143-55-4
MF:
C17H20F6N2O3
Structure:
Chemical Name:
Flucloxacillin sodium
CAS:
1847-24-1
MF:
C19H18ClFN3NaO5S
Structure:
Chemical Name:
Human Menopausal Gonadotrophin
CAS:
61489-71-2
MF:
C9H18O
Structure:
Chemical Name:
Methscopolamine bromide
CAS:
155-41-9
MF:
C18H24BrNO4
Structure:
Chemical Name:
2-BENZOYLACETANILIDE
CAS:
959-66-0
MF:
C15H13NO2
Structure:
Chemical Name:
4-HYDROXYTAMOXIFEN
CAS:
68047-06-3
MF:
C26H29NO2
Structure:
Chemical Name:
Clevudine
CAS:
163252-36-6
MF:
C10H13FN2O5
Structure:
Chemical Name:
Benactyzine
CAS:
302-40-9
MF:
C20H25NO3
Structure:
Chemical Name:
beta-D-Fructopyranose
CAS:
7660-25-5
MF:
C6H12O6
Structure:
Chemical Name:
Primaquine
CAS:
90-34-6
MF:
C15H21N3O
Structure:
Chemical Name:
Landiolol
CAS:
133242-30-5
MF:
C25H39N3O8
Structure:
Chemical Name:
Piperazinone, 3-(2-thienyl)- (9CI)
CAS:
86696-86-8
MF:
C8H10N2OS
Structure:
Chemical Name:
Norfloxacinehydrochloride
CAS:
68077-27-0
MF:
C16H19ClFN3O3
Structure:
Chemical Name:
Cefminox
CAS:
75481-73-1
MF:
C16H21N7O7S3
Chemical Name:
Tilmicosin phosphate
Structure:
Chemical Name:
N-Boc-N-Desmethyl Imatinib
CAS:
1076199-23-9
MF:
C33H37N7O3
Structure:
Chemical Name:
2-Bromo-N-(fur-2-ylmethyl)benzenesulphonamide
CAS:
849056-66-2
MF:
C11H10BrNO3S
Structure:
Chemical Name:
4-BROMO-N-TERT-BUTYL-BENZENESULFONAMIDE
CAS:
93281-65-3
MF:
C10H14BrNO2S
Structure:
Chemical Name:
EPROSARTAN
CAS:
133040-01-4
MF:
C23H24N2O4S
Structure:
Chemical Name:
Benzonatate
CAS:
104-31-4
MF:
C30H53NO11
Structure:
Chemical Name:
PIPERAZINE CITRATE HYDRATE
CAS:
41372-10-5
MF:
C10H18N2O7
Structure:
Chemical Name:
3-Bromo-N-isopropyl-5-nitrobenzamide
CAS:
941294-16-2
MF:
C10H11BrN2O3
Structure:
Chemical Name:
Garenoxacin
CAS:
194804-75-6
MF:
C23H20F2N2O4
Structure:
Chemical Name:
Metaxalone
CAS:
1665-48-1
MF:
C12H15NO3
Structure:
Chemical Name:
4-Bromo-N-isopropylbenzenesulfonamide
CAS:
1984-27-6
MF:
C9H12BrNO2S
Structure:
Chemical Name:
Piperacillin
CAS:
61477-96-1
MF:
C23H27N5O7S
Structure:
Chemical Name:
Methylphenidate hydrochloride
CAS:
298-59-9
MF:
C14H20ClNO2
Structure:
Chemical Name:
TROXIPIDE
CAS:
99777-81-8
MF:
C15H22N2O4
Structure:
Chemical Name:
Manidipine
CAS:
120092-68-4
MF:
C35H38N4O6
Structure:
Chemical Name:
OLEANDOMYCIN PHOSPHATE
CAS:
7060-74-4
MF:
C35H64NO16P
Structure:
Chemical Name:
PACHYCARPINE
CAS:
492-08-0
MF:
C15H26N2
Structure:
Chemical Name:
OXACILLIN
CAS:
66-79-5
MF:
C19H19N3O5S
Structure:
Chemical Name:
FENOTEROL HYDROBROMIDE
CAS:
1944-12-3
MF:
C17H21NO4.BrH
Structure:
Chemical Name:
Barnidipine
CAS:
104713-75-9
MF:
C27H29N3O6
Structure:
Chemical Name:
5-(1-Hydroxy-2-tert-butylamino-ethyl)benzene-1,3-diol
CAS:
23031-25-6
MF:
C12H19NO3
Structure:
Chemical Name:
Mecamylamine hydrochloride
CAS:
826-39-1
MF:
C11H22ClN
Structure:
Chemical Name:
N-DESMETHYL IMATINIB
CAS:
1356565-46-2
MF:
C42H47N9O2
Structure:
Chemical Name:
(S)-MEPHENYTOIN
CAS:
50-12-4
MF:
C12H14N2O2
Structure:
Chemical Name:
MEFLOQUINE
CAS:
53230-10-7
MF:
C17H16F6N2O
Structure:
Chemical Name:
5-(N,N-DIETHYLSULFAMOYL)-2-METHYLPHENYLBORONIC ACID
CAS:
871329-80-5
MF:
C11H18BNO4S
Structure:
Chemical Name:
CARBENICILLIN
CAS:
4697-36-3
MF:
C17H18N2O6S
Structure:
Chemical Name:
BROMOHEXINE
CAS:
3572-43-8
MF:
C14H20Br2N2
Structure:
Chemical Name:
Carteolol
CAS:
51781-06-7
MF:
C16H24N2O3
Structure:
Chemical Name:
1-(4-BORONOPHENYLSULFONYL)AZETIDINE
CAS:
871329-68-9
MF:
C9H12BNO4S
Structure:
Chemical Name:
Fenfluramine hydrochloride
CAS:
404-82-0
MF:
C12H17ClF3N
Structure:
Chemical Name:
SARALASIN
CAS:
34273-10-4
MF:
C42H65N13O10
Structure:
Chemical Name:
3-N-BUTYLSULFAMOYLPHENYLBORONIC ACID
CAS:
871329-78-1
MF:
C10H16BNO4S
Structure:
Chemical Name:
FLUSPIRILENE
CAS:
1841-19-6
MF:
C29H31F2N3O
Structure:
Chemical Name:
Acetylspiramycin
CAS:
24916-51-6
MF:
C45H76N2O15
Structure:
Chemical Name:
LEVOFLOXACIN ACID ESTER
MF:
C15H13F2NO4
Chemical Name:
Corticotropin
CAS:
9002-60-2
MF:
C207H308N56O58S
Structure:
Chemical Name:
Tobramycin sulfate
CAS:
49842-07-1
MF:
C18H39N5O13S
Structure:
Chemical Name:
Metformin
CAS:
657-24-9
MF:
C4H11N5
Structure:
Chemical Name:
BEZAFIBRATE
CAS:
63927-29-7
MF:
C19H20ClNO4
Structure:
Chemical Name:
CHLORMADINON
CAS:
1961-77-9
MF:
C21H27ClO3
Structure:
Chemical Name:
Viaminate
CAS:
53839-71-7
MF:
C29H37NO3